SP System M4 Series HPA Adapter & Magazine for Tokyo Marui MWS GBB (I)

The SP System M4 Series HPA Adapter & Magazine converts Tokyo Marui MWS GBB rifles to run on HPA while accepting standard AEG M4 magazines, delivering the consistency and efficiency of air without sacrificing capacity or reliability. Precision-machined from 6061 aluminium, this adapter is built for hard use and clean alignment, making it a popular choice for competitive and high-tempo play.

Supplied with EU and US input adapters, it’s ready to integrate into most HPA setups out of the box.

Key Features (Quick View)

• Converts TM MWS GBB rifles to HPA

• Accepts AEG M4 mid-cap and high-cap magazines

• CNC 6061 aluminium construction for durability

• Feed window for accurate magazine alignment

• Includes EU and US HPA input adapters

• Metal/polymer hybrid build

• Non two-tone finish

Construction & Reliability

Machined from CNC 6061 aluminium, the SP System adapter offers excellent strength-to-weight balance and precise tolerances for dependable feeding. Rubber interface components help ensure a secure seal and stable fit under sustained use. The feed window aids correct magazine positioning, reducing misfeeds and improving consistency across different AEG mag brands.

Performance & Field Use

Running your MWS on HPA brings stable FPS, improved efficiency, and longer uninterrupted playtime. By enabling the use of common AEG M4 magazines, the system increases on-field capacity and simplifies loadout management—ideal for CQB, competition, and longer outdoor games where reload frequency matters.

Compatibility

• Platform: M4

• Primary Compatibility: Tokyo Marui MWS GBB system

• Accepts AEG M4 mid-cap & high-cap magazines

• HPA input via EU or US adapter (both included)

Ideal For

• TM MWS owners moving to HPA

• Competitive and high-tempo skirmishers

• Players wanting higher capacity and consistency

• Loadouts standardised around AEG M4 magazines

Product Specifications

• Brand: SP Systems

• Product Type: HPA Adapter & Magazine

• Power Type: HPA

• Platform: M4 (TM MWS)

• Materials: 6061 Aluminium, Rubber

• Magazine Type: HPA (AEG M4 compatible)

• Construction: Metal / Polymer

• Two-Tone: No

• SKU: 311146

Range Overview – SP System HPA Conversions

SP System HPA solutions are engineered to bridge gas-blowback platforms with the efficiency and consistency of high-pressure air. Focused on precision machining and practical compatibility, the range enables players to modernise their setups while retaining familiar ergonomics and magazine ecosystems.

Manufacturer

SP Systems specialises in precision HPA components for airsoft platforms, delivering conversion solutions built for reliability, compatibility and competitive performance.

Safety Information

HPA systems operate under high pressure. Ensure all regulators, tanks and lines are correctly rated and securely connected before use. Verify magazine compatibility and alignment prior to play. Always wear certified eye protection and comply with site rules and local regulations.